Drill Bit Convenient To Use Cobalt Coating Drill High Toughness High Strength For Perforating Various Materials 3-12 4-12 4-20 4-22 6-24 4-32 6-35

Drill Bit Convenient To Use Cobalt Coating Drill High Toughness High Strength for Perforating Various Materials 3-12 4-12 4-20 4-22 6-24 4-32 6-35 Specification: Item Type: Step Drill Bit Material: High speed steel Standardoptional: 3-12 4-12 4-20 4-22 6-24 4-32 6-35 Package List: 1 x Drill Bit Note: 1. Hand drills and table drills can be used for opening stainless steel plates can be opened within 1mm by hand drill and 2-3mm plates can be opened with table drills. 2. The speed of the stainless steel opening can not be fast a few hundred turns can be 3. It is best to use water injection or cutting fluid for cooling during processing which can effectively extend the life of the drill.